Journey into Mystery# 119, page 12 (Aug 1965). Kirby/Colletta. The published page followed by a scan of the original artwork. Notice at the top of the original you can see where Colletta used white-out to achieve the speed lines over that black area, but when published a lot of these tiny details are lost.

Here is the cover of Eternals# 8 (Feb 1977) by Jack Kirby and Frank Giacoia. You can see the three phases the image went through: (1) a photocopy of the original pencils, (2) a scan of the finished original artwork, then (3) the final published version. The blank space at the top of the photocopy was on the original image to leave room for the “Marvel Comics Group” logo.